1021231 has 8 divisors (see below), whose sum is σ = 1094400. Its totient is φ = 950040.

The previous prime is 1021217. The next prime is 1021243. The reversal of 1021231 is 1321201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021231 - 2⁵ = 1021199 is a prime.

It is a super-2 number, since 2×1021231² = 2085825510722, which contains 22 as substring.

1021231 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666 + ... + 1576.

It is an arithmetic number, because the mean of its divisors is an integer number (136800).

2^1021231 is an apocalyptic number.

1021231 is a deficient number, since it is larger than the sum of its proper divisors (73169).

1021231 is an equidigital number, since it uses as much as digits as its factorization.

1021231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1021231 is about 1010.5597458834. The cubic root of 1021231 is about 100.7027498578.

Adding to 1021231 its reverse (1321201), we get a palindrome (2342432).

The spelling of 1021231 in words is "one million, twenty-one thousand, two hundred thirty-one".